Recent content by ralphbsz

There used to be a circuit diagram on the web for the hardware of a UPB interface to a microcontroller, consisting of a handful of coils and capacitors going into a microcontroller. Anyone know where to find it? Let me explain why ... I have a smallish setup of UPS switches and outlets at home...

What is the current state of the UPB market? Is continued supply of additional components likely, or is it endangered? I'm not trying to start a flame war, nor dump on any UPB companies, nor ask whether UPB or a different communication mechanism is better. My question is actually quite simple...

One would hope that the good folks at Dallas (who usually are VERY smart) would have put a pulldown resistor on the Vdd pin, so if left unconnected by mistake, it defaults to ground. In my case, the Vdd pin is clipped off as short as possible, and the little leftover stub insulated with heat...

Does anyone know what happens when one is running the sensor in parasite mode (no +5V on the sensor network), but one forgets to connect pin 3 to ground? Are the sensors going to mostly work, or be a little unreliable, or am I looking at a desaster? I just discovered last night that I've been...